Silicon Laboratories Finland WT11IA Bluetooth Module WT11i-a User Manual Product Data Sheet

Silicon Laboratories Finland Oy Bluetooth Module WT11i-a Product Data Sheet

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WT11i-A DATA SHEET Thursday, 10 March 2011 Version 1.1

Bluegiga Technologies Oy Copyright © 2000-2011 Bluegiga Technologies All rights reserved. Bluegiga Technologies assumes no responsibility for any errors which may appear in this manual. Furthermore, Bluegiga Technologies reserves the right to alter the hardware, software, and/or specifications detailed here at any time without notice and does not make any commitment to update the information contained here. Bluegiga’s products are not authorized for use as critical components in life support devices or systems. The WRAP is a registered trademark of Bluegiga Technologies The Bluetooth trademark is owned by the Bluetooth SIG Inc., USA and is licensed to Bluegiga Technologies. All other trademarks listed herein are owned by their respective owners.

Bluegiga Technologies Oy VERSION HISTORY Version Comment 1.1 FCC radiation exposure statement updated 1.0 Release 0.9 Certification infromation added 0.1 First draft

Bluegiga Technologies Oy TABLE OF CONTENTS 1 Ordering Information......................................................................................................................................7 2 Pinout and Terminal Description ...................................................................................................................8 3 Electrical Characteristics ............................................................................................................................ 11 3.1 Absolute Maximum Ratings ................................................................................................................ 11 3.2 Recommended Operating Conditions ................................................................................................. 11 4 Physical Dimensions .................................................................................................................................. 12 5 Layout Guidelines ....................................................................................................................................... 14 5.1 WT11i-A .............................................................................................................................................. 14 6 UART Interface ........................................................................................................................................... 15 6.1 UART Bypass ...................................................................................................................................... 17 6.2 UART Configuration While Reset is Active ......................................................................................... 17 6.3 UART Bypass Mode ............................................................................................................................ 17 7 USB Interface ............................................................................................................................................. 18 7.1 USB Data Connections ....................................................................................................................... 18 7.2 USB Pull-Up resistor ........................................................................................................................... 18 7.3 USB Power Supply .............................................................................................................................. 18 7.4 Self-Powered Mode ............................................................................................................................. 18 7.5 Bus-Powered Mode ............................................................................................................................. 19 7.6 USB Suspend Current ......................................................................................................................... 20 7.7 USB Detach and Wake-Up Signaling.................................................................................................. 20 7.8 USB Driver .......................................................................................................................................... 21 7.9 USB v2.0 Compliance and Compatibility ............................................................................................ 21 8 Serial Peripheral Interface (SPI) ................................................................................................................. 22 9 PCM Codec Interface ................................................................................................................................. 23 9.1 PCM Interface Master/Slave ............................................................................................................... 23 9.2 Long Frame Sync ................................................................................................................................ 24 9.3 Short Frame Sync ............................................................................................................................... 24 9.4 Multi-slot Operation ............................................................................................................................. 25 9.5 GCI Interface ....................................................................................................................................... 25 9.6 Slots and Sample Formats .................................................................................................................. 26 9.7 Additional Features ............................................................................................................................. 27 9.8 PCM_CLK and PCM_SYNC Generation ............................................................................................ 27 9.9 PCM Configuration .............................................................................................................................. 28 10 I/O Parallel Ports ..................................................................................................................................... 30 10.1 PIO Defaults ................................................................................................................................. 30 11 Reset ....................................................................................................................................................... 31 11.1 Pin States on Reset ..................................................................................................................... 31

Bluegiga Technologies Oy 12 Contact Information................................................................................................................................. 32

Bluegiga Technologies Oy WT11i Bluetooth® Module DESCRIPTION WT11i is a class 1, Bluetooth® 2.1 + EDR module. It introduces three times faster data rates compared to existing Bluetooth® 1.2 modules even with lower power consumption! WT11i is a highly integrated and sophisticated Bluetooth® module, containing all the necessary elements from Bluetooth® radio to antenna and a fully implemented protocol stack. Therefore WT11i provides an ideal solution for developers who want to integrate Bluetooth® wireless technology into their design with limited knowledge of Bluetooth® and RF technologies.. By default WT11i module is equipped with powerful and easy-to-use iWRAP firmware. iWRAP enables users to access Bluetooth® functionality with simple ASCII commands delivered to the module over serial interface - it's just like a Bluetooth® modem. APPLICATIONS: • Hand held terminals • Industrial devices • Point-of-Sale systems • PCs • Personal Digital Assistants (PDAs) • Computer Accessories • Access Points • Automotive Diagnostics Units FEATURES: • Fully Qualified Bluetooth v2.1 + EDR end product, CE and FCC and IC • TX power : 18 dBm • RX sensitivity : -82 dBm • Chip antenna or U.FL connector • Class 1, range up to 300 meters • Industrial temperature range from -40oC to +85oC • RoHS Compliant • USB interface (USB 2.0 compatible) • UART with bypass mode • 6 x GPIO • 1 x 8-bit AIO • Support for 802.11 Coexistence • Integrated iWRAPTM Bluetooth stack or HCI firmware

Bluegiga Technologies Oy Page 7 of 34 1 Ordering Information WT11i-A-HCI Product series Fimrware HCI = HCI firmware (Bluetooth 2.0 + EDR) HCI21= HCI firmware (Bluetooth 2.1 + EDR) AI = iWRAP 2.2.0 AI3 = iWRAP 3.0.0 AI4 = iWRAP 4.0.0 C = Custom* HW version A = Chip antenna, extended temperature range E = U.FL connector

Bluegiga Technologies Oy Page 8 of 34 2 Pinout and Terminal Description 12345678910121113141917181615242223212027282625GNDVDDPIO2PIO3NRTSRXDPCMOUSB_D+USB_D-NCTSPCMIPCMCPCMSGNDGNDAIOTXDPIO5MOSIMISOSCLKNCSBPIO4PIO7PIO6RESVDDGNDWT11 Figure 1: WT11i connection diagram PIN NUMBERPAD TYPE DESCRIPTIONRESET 17Input, internal 220kohm pull-down, internal start up reset circuitryActive high reset. Keep low for >5 ms to cause a resetGND1, 14, 15, 28GND GNDVDD_PA 2Supply voltage Supply voltage for the RF power amplifierVDD 16 Supply voltageSupply voltage for BC4 and the flash memory Table 1: Supply and RF Terminal Descriptions

Bluegiga Technologies Oy Page 9 of 34 PIO PORTPIN NUMBERPAD TYPE DESCRIPTIONPIO[2] 3Bi-directional, programmamble strength internal pull-down/pull-upProgrammamble input/output linePIO[3] 4Bi-directional, programmamble strength internal pull-down/pull-upProgrammamble input/output linePIO[4] 27Bi-directional, programmamble strength internal pull-down/pull-upProgrammamble input/output linePIO[5] 32Bi-directional, programmamble strength internal pull-down/pull-upProgrammamble input/output linePIO[6] 25Bi-directional, programmamble strength internal pull-down/pull-upProgrammamble input/output linePIO[7] 26Bi-directional, programmamble strength internal pull-down/pull-upProgrammamble input/output lineAIO[1] 34 Bi-directionalProgrammamble analog input/output line Table 2: GPIO Terminal Descriptions SPI INTERFACEPIN NUMBERPAD TYPE DESCRIPTIONPCM_OUT 7CMOS output, tri-state, weak internal pull-downSynchronous data outputPCM_IN 11CMOS input, weak internal pull-downSynchronous data inputPCM_SYNC 13Bi-directional, weak internal pull-downSynchronous data syncPCM_CLK 12Bi-directional, weak internal pull-downSynchronous data clock Table 3: PCM Terminal Descriptions UART InterfacesPIN NUMBERPAD TYPE DESCRIPTIONUART_TX 33CMOS output, tri-state, with weak internal pull-upUART data output, active highUART_RTS# 5CMOS output, tri-state, with weak internal pull-upUART request to send, active lowUART_RX 6CMOS input, tri-state, with weak internal pull-downUART data input, active highUART_CTS# 10CMOS input, tri-state, with weak internal pull-downUART clear to send, active low Table 4: UART Terminal Descriptions

Bluegiga Technologies Oy Page 10 of 34 USB InterfacesPIN NUMBERPAD TYPE DESCRIPTIONUSB+ 8BidirectionalUSB data plus with selectable internal 1.5k pull-up resistorUSB- 9Bidirectional USB data minus Table 5: USB Terminal Descriptions SPI INTERFACEPIN NUMBERPAD TYPE DESCRIPTIONSPI_MOSI 31CMOS input with weak internal pull-downSPI data inputSPI_CS# 28CMOS input with weak internal pull-upChip select for Serial Peripheral Interface, active lowSPI_CLK 29CMOS input with weak internal pull-downSPI clockSPI_MISO 30CMOS output, tristate, with weak internal pull down SPI data output Table 6: Terminal Descriptions

Bluegiga Technologies Oy Page 11 of 34 3 Electrical Characteristics 3.1 Absolute Maximum Ratings Min Max Unit-40 85 °C-0.4 3.6 VVSS-0.4 VDD+0.4 VRatingStorage TemperatureOther Terminal VoltagesVDD_PA, VDD Table 7: Absolute Maximum Ratings 3.2 Recommended Operating Conditions Min Max Unit-40 85 °C3.0 3.6 VRatingOperating Temperature RangeVDD_PA, VDD *) *) VDD_PA has an effect on the RF output power. Table 8: Recommended Operating Conditions

Bluegiga Technologies Oy Page 12 of 34 4 Physical Dimensions Figure 2: Physical dimensions (top view) Figure 3: Dimensions of WT11i

Bluegiga Technologies Oy Page 13 of 34 TBA Figure 4: Recommended land pattern

Bluegiga Technologies Oy Page 14 of 34 5 Layout Guidelines 5.1 WT11i-A Edge of the PCBDo not place copper or any metal within the area marked with cross linesGND area with stitching vias Figure 5: Recommended positions for WT11i-A

Bluegiga Technologies Oy Page 15 of 34 6 UART Interface This is a standard UART interface for communicating with other serial devices.WT11i UART interface provides a simple mechanism for communicating with other serial devices using the RS232 protocol. Four signals are used to implement the UART function. When WT11i is connected to another digital device, UART_RX and UART_TX transfer data between the two devices. The remaining two signals, UART_CTS and UART_RTS, can be used to implement RS232 hardware flow control where both are active low indicators. All UART connections are implemented using CMOS technology and have signalling levels of 0V and VDD. UART configuration parameters, such as data rate and packet format, are set using WT11i software. Note: In order to communicate with the UART at its maximum data rate using a standard PC, an accelerated serial port adapter card is required for the PC. Table 9: Possible UART Settings The UART interface is capable of resetting WT11i upon reception of a break signal. A break is identified by a continuous logic low (0V) on the UART_RX terminal, as shown in Figure 7. If tBRK is longer than the value, defined by PSKEY_HOST_IO_UART_RESET_TIMEOUT, (0x1a4), a reset will occur. This feature allows a host to initialise the system to a known state. Also, WT11i can emit a break character that may be used to wake the host. Figure 6: Break Signal Table 10 shows a list of commonly used data rates and their associated values for PSKEY_UART_BAUD_RATE (0x204). There is no requirement to use these standard values. Any data rate within the supported range can be set in the PS Key according to the formula in Equation 1

Bluegiga Technologies Oy Page 16 of 34 Equation 1: Data Rate Table 10: Standard Data Rates

Bluegiga Technologies Oy Page 17 of 34 6.1 UART Bypass Figure 7: UART Bypass Architecture 6.2 UART Configuration While Reset is Active The UART interface for WT11i while the chip is being held in reset is tristate. This will allow the user to daisy chain devices onto the physical UART bus. The constraint on this method is that any devices connected to this bus must tristate when WT11i reset is de-asserted and the firmware begins to run. 6.3 UART Bypass Mode Alternatively, for devices that do not tristate the UART bus, the UART bypass mode on BlueCore4-External can be used. The default state of BlueCore4-External after reset is de-asserted; this is for the host UART bus to be connected to the BlueCore4-External UART, thereby allowing communication to BlueCore4-External via the UART. All UART bypass mode connections are implemented using CMOS technology and have signalling levels of 0V and VDD. In order to apply the UART bypass mode, a BCCMD command will be issued to BlueCore4-External. Upon this issue, it will switch the bypass to PIO[7:4] as Figure XXX indicates. Once the bypass mode has been invoked, WT11i will enter the Deep Sleep state indefinitely. In order to re-establish communication with WT11i, the chip must be reset so that the default configuration takes effect. It is important for the host to ensure a clean Bluetooth disconnection of any active links before the bypass mode is invoked. Therefore, it is not possible to have active Bluetooth links while operating the bypass mode. The current consumption for a device in UART bypass mode is equal to the values quoted for a device in standby mode.

Bluegiga Technologies Oy Page 18 of 34 7 USB Interface This is a full speed (12Mbits/s) USB interface for communicating with other compatible digital devices. WT11i acts as a USB peripheral, responding to requests from a master host controller such as a PC. The USB interface is capable of driving a USB cable directly. No external USB transceiver is required. The device operates as a USB peripheral, responding to requests from a master host controller such as a PC. Both the OHCI and the UHCI standards are supported. The set of USB endpoints implemented can behave as specified in the USB section of the Bluetooth v2.1 + EDR specification or alternatively can appear as a set of endpoints appropriate to USB audio devices such as speakers. As USB is a master/slave oriented system (in common with other USB peripherals), WT11i only supports USB Slave operation. 7.1 USB Data Connections The USB data lines emerge as pins USB_DP and USB_DN. These terminals are connected to the internal USB I/O buffers of the BlueCore4-External, therefore, have a low output impedance. To match the connection to the characteristic impedance of the USB cable, resistors must be placed in series with USB_DP/USB_DN and the cable. 7.2 USB Pull-Up resistor WT11i features an internal USB pull-up resistor. This pulls the USB_DP pin weakly high when WT11i is ready to enumerate. It signals to the PC that it is a full speed (12Mbits/s) USB device. The USB internal pull-up is implemented as a current source, and is compliant with section 7.1.5 of the USB specification v1.2. The internal pull-up pulls USB_DP high to at least 2.8V when loaded with a 15k 5% pull-down resistor (in the hub/host) when VDD_PADS = 3.1V. This presents a Thevenin resistance to the host of at least 900. Alternatively, an external 1.5k pull-up resistor can be placed between a PIO line and D+ on the USB cable. The firmware must be alerted to which mode is used by setting PSKEY_USB_PIO_PULLUP appropriately. The default setting uses the internal pull-up resistor. 7.3 USB Power Supply The USB specification dictates that the minimum output high voltage for USB data lines is 2.8V. To safely meet the USB specification, the voltage on the VDD supply terminal must be an absolute minimum of 3.1V. Bluegiga recommends 3.3V for optimal USB signal quality. 7.4 Self-Powered Mode In self-powered mode, the circuit is powered from its own power supply and not from the VBUS (5V) line of the USB cable. It draws only a small leakage current (below 0.5mA) from VBUS on the USB cable. This is the easier mode for which to design, as the design is not limited by the power that can be drawn from the USB hub or root port. However, it requires that VBUS be connected to WT11i via a resistor network (Rvb1 and Rvb2), so WT11i can detect when VBUS is powered up. BlueCore4-External will not pull USB_DP high when VBUS is off. Self-powered USB designs (powered from a battery or PSU) must ensure that a PIO line is allocated for USB pullup purposes. A 1.5k 5% pull-up resistor between USB_DP and the selected PIO line should be fitted to the design. Failure to fit this resistor may result in the design failing to be USB compliant in self-powered mode. The internal pull-up in BlueCore is only suitable for bus-powered USB devices, e.g., dongles.

Bluegiga Technologies Oy Page 19 of 34 Figure 8: USB Connections for Self-Powered Mode The terminal marked USB_ON can be any free PIO pin. The PIO pin selected must be registered by setting PSKEY_USB_PIO_VBUS to the corresponding pin number. Identifier Value FunctionRS0 to 10 (to be matched per design)** Impedance matching to USB cableRvb122k 5% VBUS ON sense dividerRvb247k 5% VBUS ON sense divider Figure 9: USB Interface Component Values **) WT11i has internal 22 ohm series resistors at the USB lines. 7.5 Bus-Powered Mode In bus-powered mode, the application circuit draws its current from the 5V VBUS supply on the USB cable. WT11i negotiates with the PC during the USB enumeration stage about how much current it is allowed to consume. On power-up the device must not draw more than 100 mA but after being configured it can draw up to 500 mA. For WT11i, the USB power descriptor should be altered to reflect the amount of power required. This is accomplished by setting PSKEY_USB_MAX_POWER (0x2c6). This is higher than for a Class 2 application due to the extra current drawn by the Transmit RF PA. By default for WT11i the setting is 300 mA. When selecting a regulator, be aware that VBUS may go as low as 4.4V. The inrush current (when charging reservoir and supply decoupling capacitors) is limited by the USB specification. See the USB Specification. Some applications may require soft start circuitry to limit inrush current if more than 10uF is present between VBUS and GND. The 5V VBUS line emerging from a PC is often electrically noisy. As well as regulation down to 3.3V and 1.8V, applications should include careful filtering of the 5V line to attenuate noise that is above the voltage regulator bandwidth. Excessive noise on WT11i supply pins will result in reduced receiver sensitivity and a distorted RF transmit signal.

Bluegiga Technologies Oy Page 20 of 34 Figure 10: USB Connections for Bus-Powered Mode 7.6 USB Suspend Current All USB devices must permit the USB controller to place them in a USB suspend mode. While in USB Suspend, bus-powered devices must not draw more than 2.5mA from USB VBUS (self-powered devices may draw more than 2.5mA from their own supply). This current draw requirement prevents operation of the radio by bus-powered devices during USB Suspend. When computing suspend current, the current from VBUS through the bus pull-up and pull-down resistors must be included. The pull-up resistor at the device is 1.5 k. (nominal). The pull-down resistor at the hub is 14.25k. to 24.80k. The pull-up voltage is nominally 3.3V, which means that holding one of the signal lines high takes approximately 200uA, leaving only 2.3mA available from a 2.5mA budget. Ensure that external LEDs and/or amplifiers can be turned off by BlueCore4-External. The entire circuit must be able to enter the suspend mode. 7.7 USB Detach and Wake-Up Signaling WT11i can provide out-of-band signaling to a host controller by using the control lines called USB_DETACH and USB_WAKE_UP. These are outside the USB specification (no wires exist for them inside the USB cable), but can be useful when embedding WT11i into a circuit where no external USB is visible to the user. Both control lines are shared with PIO pins and can be assigned to any PIO pin by setting PSKEY_USB_PIO_DETACH and PSKEY_USB_PIO_WAKEUP to the selected PIO number. USB_DETACH is an input which, when asserted high, causes WT11i to put USB_DN and USB_DP in high impedance state and turns off the pull-up resistor on DP. This detaches the device from the bus and is logically equivalent to unplugging the device. When USB_DETACH is taken low, WT11i will connect back to USB and await enumeration by the USB host. USB_WAKE_UP is an active high output (used only when USB_DETACH is active) to wake up the host and allow USB communication to recommence. It replaces the function of the software USB WAKE_UP message (which runs over the USB cable) and cannot be sent while BlueCore4-External is effectively disconnected from the bus.

Bluegiga Technologies Oy Page 22 of 34 8 Serial Peripheral Interface (SPI) The SPI port can be used for system debugging. It can also be used for programming the Flash memory and setting the PSKEY configurations. WT11i uses 16-bit data and 16-bit address serial peripheral interface, where transactions may occur when the internal processor is running or is stopped. SPI interface is connected using the MOSI, MISO, CSB and CLK pins. Please, contact support@bluegiga.com for detailed information about the instruction cycle.

Bluegiga Technologies Oy Page 23 of 34 9 PCM Codec Interface PCM is a standard method used to digitize audio (particularly voice) for transmission over digital communication channels. Through its PCM interface, WT11i has hardware support for continual transmission and reception of PCM data, thus reducing processor overhead for wireless headset applications. WT11i offers a bidirectional digital audio interface that routes directly into the baseband layer of the on-chip firmware. It does not pass through the HCI protocol layer. Hardware on WT11i allows the data to be sent to and received from a SCO connection. Up to three SCO connections can be supported by the PCM interface at any one time. WT11i can operate as the PCM interface master generating an output clock of 128, 256 or 512kHz. When configured as PCM interface slave, it can operate with an input clock up to 2048kHz. WT11i is compatible with a variety of clock formats, including Long Frame Sync, Short Frame Sync and GCI timing environments. It supports 13-bit or 16-bit linear, 8-bit µ-law or A-law companded sample formats at 8ksamples/s and can receive and transmit on any selection of three of the first four slots following PCM_SYNC. The PCM configuration options are enabled by setting PSKEY_PCM_CONFIG32. WT11i interfaces directly to PCM audio devices. NOTE: Analog audio lines are very sensitive to RF disturbance. Use good layout practices to ensure noise less audio. Make sure that the return path for the audio signals follows the forward current all the way as close as possible and use fully differential signals when possible. Do not compromise audio routing. 9.1 PCM Interface Master/Slave When configured as the master of the PCM interface, WT11i generates PCM_CLK and PCM_SYNC. Figure 12: PCM Interface Master When configured as the Slave of the PCM interface, WT11i accepts PCM_CLK rates up to 2048kHz.

Bluegiga Technologies Oy Page 24 of 34 Figure 13: PCM Interface Slave 9.2 Long Frame Sync Long Frame Sync is the name given to a clocking format that controls the transfer of PCM data words or samples. In Long Frame Sync, the rising edge of PCM_SYNC indicates the start of the PCM word. When WT11i is configured as PCM master, generating PCM_SYNC and PCM_CLK, then PCM_SYNC is 8-bits long. When WT11i is configured as PCM Slave, PCM_SYNC may be from two consecutive falling edges of PCM_CLK to half the PCM_SYNC rate, i.e., 62.5s long. Figure 14: Long Frame Sync (Shown with 8-bit Companded Sample) WT11i samples PCM_IN on the falling edge of PCM_CLK and transmits PCM_OUT on the rising edge. PCM_OUT may be configured to be high impedance on the falling edge of PCM_CLK in the LSB position or on the rising edge. 9.3 Short Frame Sync In Short Frame Sync, the falling edge of PCM_SYNC indicates the start of the PCM word. PCM_SYNC is always one clock cycle long.

Bluegiga Technologies Oy Page 25 of 34 Figure 15: Short Frame Sync (Shown with 16-bit Sample) As with Long Frame Sync, WT11i samples PCM_IN on the falling edge of PCM_CLK and transmits PCM_OUT on the rising edge. PCM_OUT may be configured to be high impedance on the falling edge of PCM_CLK in the LSB position or on the rising edge. 9.4 Multi-slot Operation More than one SCO connection over the PCM interface is supported using multiple slots. Up to three SCO connections can be carried over any of the first four slots. Figure 16: Multi-slot Operation with Two Slots and 8-bit Companded Samples 9.5 GCI Interface WT11i is compatible with the GCI, a standard synchronous 2B+D ISDN timing interface. The two 64kbits/s B channels can be accessed when this mode is configured.

Bluegiga Technologies Oy Page 26 of 34 Figure 17: GCI Interface The start of frame is indicated by the rising edge of PCM_SYNC and runs at 8kHz. With WT11i in Slave mode, the frequency of PCM_CLK can be up to 4.096MHz. 9.6 Slots and Sample Formats WT11i can receive and transmit on any selection of the first four slots following each sync pulse. Slot durations can be either 8 or 16 clock cycles. Durations of 8 clock cycles may only be used with 8-bit sample formats. Durations of 16 clocks may be used with 8-bit, 13-bit or 16-bit sample formats. WT11i supports 13-bit linear, 16-bit linear and 8-bit -law or A-law sample formats. The sample rate is 8ksamples/s. The bit order may be little or big endian. When 16-bit slots are used, the 3 or 8 unused bits in each slot may be filled with sign extension, padded with zeros or a programmable 3-bit audio attenuation compatible with some Motorola codecs.

Bluegiga Technologies Oy Page 27 of 34 Figure 18: 16-bit Slot Length and Sample Formats 9.7 Additional Features WT11i has a mute facility that forces PCM_OUT to be 0. In master mode, PCM_SYNC may also be forced to 0 while keeping PCM_CLK running which some codecs use to control power down. 9.8 PCM_CLK and PCM_SYNC Generation WT11i has two methods of generating PCM_CLK and PCM_SYNC in master mode. The first is generating these signals by DDS from BlueCore4-External internal 4MHz clock. Using this mode limits PCM_CLK to 128, 256 or 512kHz and PCM_SYNC to 8kHz. The second is generating PCM_CLK and PCM_SYNC by DDS from an internal 48MHz clock (which allows a greater range of frequencies to be generated with low jitter but consumes more power). This second method is selected by setting bit 48M_PCM_CLK_GEN_EN in PSKEY_PCM_CONFIG32. When in this mode and with long frame sync, the length of PCM_SYNC can be either 8 or 16 cycles of PCM_CLK, determined by LONG_LENGTH_SYNC_EN in PSKEY_PCM_CONFIG32. The Equation XXX describes PCM_CLK frequency when being generated using the internal 48MHz clock:

Bluegiga Technologies Oy Page 28 of 34 Equation 2: PCM_CLK Frequency When Being Generated Using the Internal 48MHz Clock The frequency of PCM_SYNC relative to PCM_CLK can be set using Equation XXX: Equation 3: PCM_SYNC Frequency Relative to PCM_CLK CNT_RATE, CNT_LIMIT and SYNC_LIMIT are set using PSKEY_PCM_LOW_JITTER_CONFIG. As an example, to generate PCM_CLK at 512kHz with PCM_SYNC at 8kHz, set PSKEY_PCM_LOW_JITTER_CONFIG to 0x08080177. 9.9 PCM Configuration The PCM configuration is set using two PS Keys, PSKEY_PCM_CONFIG32 detailed in Table XXX and PSKEY_PCM_LOW_JITTER_CONFIG in Table XXX. The default for PSKEY_PCM_CONFIG32 is 0x00800000, i.e., first slot following sync is active, 13-bit linear voice format, long frame sync and interface master generating 256kHz PCM_CLK from 4MHz internal clock with no tri-state of PCM_OUT.

Bluegiga Technologies Oy Page 29 of 34 Name Bit position Description-0Set to 0SLAVE MODE EN 10 selects Master mode with internal generation of PCM_CLK and PCM_SYNC. 1 selects Slave mode requiring externally generated PCM_CLK and PCM_SYNC. This should be set to 1 if 48M_PCM_CLK_GEN_EN (bit 11) is set.SHORT SYNC EN 20 selects long frame sync (rising edge indicates start of frame), 1 selects short frame sync (falling edge indicates start of frame).- 3 Set to 0SIGN EXTENDED EN 40 selects padding of 8 or 13-bit voice sample into a 16- bit slot by inserting extra LSBs, 1 selects sign extension. When padding is selected with 3-bit voice sample, the 3 padding bits are the audio gain setting; with 8-bit samples the 8 padding bits are zeroes.LSB FIRST EN 50 transmits and receives voice samples MSB first, 1 uses LSB first.TX TRISTATE EN 60 drives PCM_OUT continuously, 1 tri-states PCM_OUT immediately after the falling edge of PCM_CLK in the last bit of an active slot, assuming the next slot is not active.TX TRISTATE RISING EDGE EN 70 tristates PCM_OUT immediately after the falling edge of PCM_CLK in the last bit of an active slot, assuming the next slot is also not active. 1 tristates PCM_OUT after the rising edge of PCM_CLK.SYNC SUPPRESS EN 80 enables PCM_SYNC output when master, 1 suppresses PCM_SYNC whilst keeping PCM_CLK running. Some CODECS utilize this to enter a low power state.GCI MODE EN 91 enables GCI mode.MUTE EN 10 1 forces PCM_OUT to 0.48M PCM CLK GEN EN 110 sets PCM_CLK and PCM_SYNC generation via DDS from internal 4 MHz clock, as for BlueCore4-External. 1 sets PCM_CLK and PCM_SYNC generation via DDS from internal 48 MHz clock.LONG LENGTH SYNC EN 120 sets PCM_SYNC length to 8 PCM_CLK cycles and 1 sets length to 16 PCM_CLK cycles. Only applies for long frame sync and with 48M_PCM_CLK_GEN_EN set to 1.-[20:16] Set to 0b00000.MASTER CLK RATE [22:21] Selects 128 (0b01), 256 (0b00), 512 (0b10) kHz PCM_CLK frequency when master and 48M_PCM_CLK_GEN_EN (bit 11) is low.ACTIVE SLOT [26:23] Default is 0001. Ignored by firmawareSAMPLE_FORMAT [28:27] Selects between 13 (0b00), 16 (0b01), 8 (0b10) bit sample with 16 cycle slot duration 8 (0b11) bit sample 8 cycle slot duration. Table 11: PSKEY_PCM_CONFIG32 description Name Bit position DescriptionCNT LIMIT [12:0] Sets PCM_CLK counter limitCNT RATE [23:16] Sets PCM_CLK count rate.SYNC LIMIT [31:24] Sets PCM_SYNC division relative to PCM_CLK. Table 12: PSKEY_PCM_LOW_JITTER_CONFIG Description

Bluegiga Technologies Oy Page 30 of 34 10 I/O Parallel Ports Six lines of programmable bidirectional input/outputs (I/O) are provided. All the PIO lines are power from VDD. PIO lines can be configured through software to have either weak or strong pull-ups or pull-downs. All PIO lines are configured as inputs with weak pull-downs at reset. Any of the PIO lines can be configured as interrupt request lines or as wake-up lines from sleep modes. WT11i has a general purpose analogue interface pin AIO[1]. This is used to access internal circuitry and control signals. It may be configured to provide additional functionality. Auxiliary functions available via AIO[1] include an 8-bit ADC and an 8-bit DAC. Typically the ADC is used for battery voltage measurement. Signals selectable at this pin include the band gap reference voltage and a variety of clock signals: 48, 24, 16, 8MHz and the XTAL clock frequency. When used with analogue signals, the voltage range is constrained by the analogue supply voltage internally to the module (1.8V). When configured to drive out digital level signals (e.g., clocks), the output voltage level is determined by VDD. 10.1 PIO Defaults Bluegiga cannot guarantee that these terminal functions remain the same. Refer to the software release note for the implementation of these PIO lines, as they are firmware build-specific.

Bluegiga Technologies Oy Page 31 of 34 11 Reset WT11i may be reset from several sources: RESET pin, power on reset, a UART break character or via software configured watchdog timer. The RESET pin is an active low reset and is internally filtered using the internal low frequency clock oscillator. A reset will be performed between 1.5 and 4.0ms following RESETB being active. It is recommended that RESET be applied for a period greater than 5ms. The power on reset occurs when the VDD_CORE supply internally to the module falls below typically 1.5V and is released when VDD_CORE rises above typically 1.6V. At reset the digital I/O pins are set to inputs for bidirectional pins and outputs are tri-state. 11.1 Pin States on Reset PIN NAME STATEPIO[7:2] Input with weak pull-downPCM_OUT Tri-staed with weak pull-downPCM_IN Input with weak pull-downPCM_SYNC Input with weak pull-downPCM_CLK Input with weak pull-downUART_TX Output tristated with weak pull-upUART_RX Input with weak pull-downUART_RTS Output tristated with weak pull-upUART_CTS Input with weak pull-downUSB+ Input with weak pull-downUSB- Input with weak pull-downSPI_CSB Input with weak pull-downSPI_CLK Input with weak pull-downSPI_MOSI Input with weak pull-downSPI_MISO Output tristated with weak pull-downAIO[1] Output, driving low Table 13: Pin States on Reset

Bluegiga Technologies Oy Page 32 of 34 12 Certifications WT11i is compliant to the following specifications. 12.1 Bluetooth WT11i module is Bluetooth qualified and listed as a controller subsystem and it is Bluetooth compliant to the following profiles of the core spec version 2.1/2.1+EDR. TBA 12.2 FCC This device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) this device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation. FCC RF Radiation Exposure Statement: This equipment complies with FCC radiation exposure limits set forth for an uncontrolled environment. End users must follow the specific operating instructions for satisfying RF exposure compliance. This transmitter must not be co-located or operating in conjunction with any other antenna or transmitter. Changes or modifications not expressly approved by the party responsible for compliance could void the user's authority to operate the equipment. This transmitter is considered as mobile device and should not be used closer than 20 cm from a human body. To allow portable use in a known host class 2 permissive change is required. Please contact support@bluegiga.com for detailed information. Note: When using WT11i-A the end product must display an exterior label with the following detail incorporated: “Contains Transmitter Module FCC ID: QOQWT11IA”

Bluegiga Technologies Oy Page 33 of 34 12.3 CE WT11i meets the requirements of the standards below and hence fulfills the requirements of EMC Directive 89/336/EEC as amended by Directives 92/31/EEC and 93/68/EEC within CE marking requirement. • EMC (immunity only) EN 301 489-17 V.1.3.3 in accordance with EN 301 489-1 V1.8.1 • Radiated emissions EN 300 328 V1.7.1 12.4 Industry Canada (IC) WT11i meets Industry Canada’s procedural and specification requirements for certification. Industry Canada ID: 5123A-BGTWT11IA Operation is subject to the following two conditions: (1) this device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation. IC RF Radiation Exposure Statement: This equipment complies with IC radiation exposure limits set forth for an uncontrolled environment. End users must follow the specific operating instructions for satisfying RF exposure compliance. This transmitter must not be co-located or operating in conjunction with any other antenna or transmitter. Changes or modifications not expressly approved by the party responsible for compliance could void the user's authority to operate the equipment. Note: When using WT11i-A the end product must display an exterior label with the following detail incorporated: “Contains Transmitter Module Industry Canada ID: 5123A-BGTWT11IA”

Bluegiga Technologies Oy Page 34 of 34 13 Contact Information Sales: sales@bluegiga.com Technical support: support@bluegiga.com http://www.bluegiga.com/techforum/ Orders: orders@bluegiga.com Head Office / Finland: Phone: +358-9-4355 060 Fax: +358-9-4355 0660 Street Address: Sinikalliontie 5A 02630 ESPOO FINLAND Postal address: P.O. BOX 120 02631 ESPOO FINLAND Sales Office / USA: Phone: (781) 556-1039 Bluegiga Technologies, Inc. 99 Derby Street, Suite 200 Hingham, MA 02043